But it is normal for products to have undocumented API's and it also explains why these utilities don't necessary work on every camera (because internal API's can change from product to product and without notice.)
the shutter counter for the 40D, the 50D, the 450D, 500D, and the 1000D.
I don't recall Canon documenting the method to retreive shutter count in the Canon EOS SDK (I checked it once upon a time and didn't see it.). The shutter count information is available only on Canon DIGIC III/IV DSLRs. Mostly what photographers care about is the number of times the shutter had to open & close mechanically and in video mode it really opens once to expose the sensor and recording of video frames doesn't cause any mechanical movement of the shutter (the camera uses an electronic shutter in that mode instead of the mechanical focal plane shutter.) I'm not sure what Canon uses in their own count. While Nikon and Pentax make your life simple by storing the shutter. It is accurate and only counts upward (if someone resets a camera the count is not reset to zero.) The number that pops up is your shutter actuation. It does not use image EXIF data nor does it uses file numbering, etc. If you're filling water based things at moderate line speeds, accuracy is pretty good and tolerances are tight.Dire Studio documents that their shutter count utility gives the count of "still" photos taken by the camera but does not include video (which makes sense). You are right though in saying that filling equipment is pretty accurate generally. If anything, I am going to set my fill spec slightly lower than target and capture the savings in fill costs. If I am a manufacturer and put 100mL on a bottle but don't have a regulatory requirement with minimums, I'm not going to overfill the product 'just because'. If the manufacturer doesn't use the E marking system then all bets are off.
If you shoot a lot, 28,000 may be a little high since that is 28 of the rated life. It is fairly likely that it will be pretty close to 500 mL but not guaranteed.Īlso, that is for those that use the E marking. Shutter count is relative though a high/low count ultimately depends on how much you shoot. It means that the average of what is sold on shelf is above 500mL, but that up to 5% of bottles will be as low as 485 (3% low) and some will be as low as (but not lower than) 470mL. If a bottle says 500mL and has the E mark, then there is no guarantee that it will have 500mL in it. Look at what Stewart wrote about the E mark. It's a shame that camera manufacturers don't do something similar. However, most manufacturers in the EU will use the "e" mark, and if you see that on a bottle of beer you know immediately that (1) the average contents will be at least 500ml (2) less than 5% of bottles will be under 485ml and (3) no bottles will be under 470ml. If you buy a bottle of beer which nominally contains 500ml, what does that actually mean? If you don't know anything else about the distribution, it wouldn't mean anything more than the shutter life estimates. Whatever your Canon model, a DSLR can withstand approximately 30,000 to 300,000 shutter actuations before needing a replacement. There's a useful analogy in the field of weights and measures. I think it would be reasonable to assume it means that at least 50% of the cameras will reach 100,000, but we don't know whether 80% will, or 99% will, or how many will fail at less than 20,000, or what. Check Canon 5D Mark II Canon 5D Mark III Canon 7D Mark II 1D MARK III 1D Mark IV Canon 7D Canon 6D Canon 70D Canon 60D Canon 50D Canon 40D Canon 700D Canon 650D Canon 550D Canon 1300D Canon 1200D Canon 1100D Canon 1000D Canon Rebel T5I Canon Rebel T4i Canon Rebel T2i Canon Rebel XSi Nikon D60 Nikon D600 Sony NEX-7 shutter count. When the manufacturers say that a shutter mechanism is rated to (say) 100,000 actuations, they don't generally give us enough information to draw any statistical inferences.